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| Mirrors > Home > MPE Home > Th. List > Mathboxes > eldm1cossres2 | Structured version Visualization version GIF version | ||
| Description: Elementhood in the domain of restricted cosets. (Contributed by Peter Mazsa, 30-Dec-2018.) |
| Ref | Expression |
|---|---|
| eldm1cossres2 | ⊢ (𝐵 ∈ 𝑉 → (𝐵 ∈ dom ≀ (𝑅 ↾ 𝐴) ↔ ∃𝑥 ∈ 𝐴 𝐵 ∈ [𝑥]𝑅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eldm1cossres 39525 | . 2 ⊢ (𝐵 ∈ 𝑉 → (𝐵 ∈ dom ≀ (𝑅 ↾ 𝐴) ↔ ∃𝑥 ∈ 𝐴 𝑥𝑅𝐵)) | |
| 2 | elecALTV 39246 | . . . 4 ⊢ ((𝑥 ∈ V ∧ 𝐵 ∈ 𝑉) → (𝐵 ∈ [𝑥]𝑅 ↔ 𝑥𝑅𝐵)) | |
| 3 | 2 | el2v1 39204 | . . 3 ⊢ (𝐵 ∈ 𝑉 → (𝐵 ∈ [𝑥]𝑅 ↔ 𝑥𝑅𝐵)) |
| 4 | 3 | rexbidv 3186 | . 2 ⊢ (𝐵 ∈ 𝑉 → (∃𝑥 ∈ 𝐴 𝐵 ∈ [𝑥]𝑅 ↔ ∃𝑥 ∈ 𝐴 𝑥𝑅𝐵)) |
| 5 | 1, 4 | bitr4d 285 | 1 ⊢ (𝐵 ∈ 𝑉 → (𝐵 ∈ dom ≀ (𝑅 ↾ 𝐴) ↔ ∃𝑥 ∈ 𝐴 𝐵 ∈ [𝑥]𝑅)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∈ wcel 2144 ∃wrex 3086 Vcvv 3450 class class class wbr 5102 dom cdm 5650 ↾ cres 5652 [cec 8715 ≀ ccoss 39158 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-sep 5248 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4584 df-pr 4586 df-op 4590 df-br 5103 df-opab 5167 df-xp 5656 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-ec 8719 df-coss 39476 |
| This theorem is used by: eldmqs1cossres 39719 |
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